Bending machine



July 9,1929. H. P. LAussUcQ BENDING MACH INE 4 sheets-sheet l Filed Nov. 4, 1926 5V ,i vaya f 5111)"9, 1929. H.. P. 1 n AussucQ 1.720.335 'y BENDING MACHINE 4 Shee'cs--Sheel 3 Filed Nov. 4, 1926 Jam@ fly

July 9, 1929. H. P. L. LAUssUcQ 1.720.335

BENDING MACHINE Filed Nov. 4. 192e 4 sheets-sheet 4 WIJ r-*f [y v l I v @a Patented July 9, 1929. v

PATENT QFFEQE.

HENRI :PIERRE LAURENT LAUSSUCQ, OF READING, PENNSYLVANIA.

:BENDING- Application led November lily invention relates to bending presses ot the type intended to operate upon heavy7 material and in which one end may be opened for convenient use for removal of the iinf; ished Work.

A. purpose et my invention is to operate a closure for the open end ot a bending press by mechanical means.

A further purpose is to lock a closure by lo power-operated means preferably by rotary movement caused by plunger operation.

A further purpose is to interlock the locking' mechanism for a power-operated closure at the open end of a bending press with the l5 closure and with operating; mechanism tor the main press.

Further purposes Will appear in the specication and in the claims.

l have preferred to illustrate my invention 20 by one 'form only, selecting a torni which has proved to be practical. highly eltlcient and very satisfactory, and which at the same time Well illustrates the principles of my invention.

25 Figure 1 is an end elevation ot my preferred form.

Figure 2 is a side elevation ot the structure seen in Figure 1, tal-ien trom the rightn hand side ot that view.

'0 'Figure 3 is a top plan View oi the structure seen in Figures 1 anc 2, omittinp` some ot the parte.

Figure 4 is an end elevation7 partly sectioned, to show the detail oi part oit the lperatinu mechanism.

Figure 5 is a Ytragmentary longitudinal section through the upper beam correspoiuling); 'with a. portion of Figure t and with line 5 5 on Figure G.

l Figure 6 is a section taken upon line (5-6 of Figure 5.

Figure 7 is a section upon line 7-7 of Figure 6.

ln the drawings similar numerals indicate like parts.

ln open end bending presses provision has already been made tor holding the upper beam at the open end by a link or closure.

My invention is directed primarily to the 0 power-operation of this closure.` the locking` ot the closure in position and the interlock ing ot the devices by which these two functions and press operation are performed so as to operate reliably and to the best advantage.

The bed oi the press supports a main or MACE-IEEE.

4, 1926. Serial NO. 146,137.

stationary standard G upon which the upper or fixed beam 7 oi the press is secured. This standard is not only ot great strength but its surfaces 8 and 9 ol engagement ivith the base and fixed beam 7 are extensive in a direction parallel to the paper in Figure 1 so as to support the beam as much as possible against tilting strains due to the weight ot the beam when the closure is open. It is united to the bed and beam and is aligned by bolts 10 and 11 but the main reliance 'for the tensile strain upon the beam is placed upon through bolts 12 extending` from the bottom of the bed to the top of the beam on` opposite sides et the beam.

The upper or stationary beam carries a die 13 and the bed supports cylinders 11i in which operate plungers 15 connected by a lower platen 16 to which are attached end guides 17. rThe lower beam carries a die not shown and a table 18 adaptedtor support oit the Work and in Which I have shown rolls 19.

rlfhe cyliiulers 1l are l'e-d hydraulically through pipe 20 trom any suitable supply (not shown) which is controlled by valve 2l operated by lever 22 pivoted at 23. The valve'stems are shown at E24- and As lar as described this structure is not novel and the parts and their functions require no turther explanation.

The ends o t the lower beam, or platen travel along guides 26 carried respectively by the standard and by a side 'trame 27 secured to the main traine.

The beam terminates at its open end 'in a stem 2S which receives und is held against vertical movement by the link 2S) sWinging` about a pivot 30. The pivot rests at spaced points in ears 31 upon side trame 27. This iframe is held in place by bolts 3Q passingthrough to the lower part ot the bed and there held by nuts 33 and by bolts 3ft, 3ft at the sides and end.

The upper surface 35 ol. the stem 28 and the under surface 36 at the top ot the openn ing 37 Wit-hin the link 29 slope downwardly and outwardly just enough to allee7 the link to swing over the nose of the stem and not enough to cause any opening movement when they are tightened by the upward pull ot this end of the lined platen in use.

In order that the link may be lifted to the position seen in Figure 4, or lowered therefrom to open position, I provide a thrust bar 38 operated by hydraulic cylinder 39 through plunger Al() and cross-head 41. The

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Vtor the plungers in this cylinder and in the other cylinders shown.

The operation ot' the plunger Within the cylinder 3.9 swings the link closure 29 upon rits pivot and closes or opens the link upon Vor from the stein ot beam 7.

In order to protect against displacement Yof the Vlink 29 from its proper position upon the stem 28 l lock it there, showing one convenient method of doing` this.

As est seen in Figures 5, 6 'and 7 the stem 28 is provided with steep mutilatecL threads ofthe breech block type comprising annularlyarranged alternating segmental threads 47 and spaces 48.v The spaces permit annularly arranged inwardly projcctiufi` segmental threads 49 upon the interior ot the locking ring` 50 to pass axially oi" the thread dun ing' swinging' movement of the link closure. Spaces l alternatewith the threads 49 so that relatively the threads 47 pass througgl these spaces.

The ring' 50 is provided vvith external `teeth 52 and is supported to provide rolarial movement by guides 53, 54. A, removable plate'55 upon the front of the link and spaced from the body of the link supijiorts the structure against movement to the right in Figure 5. ,Y

lVhen the link closure has been throvvn to the position shown in Figures 5 and 6 the ring is turned a distance corresponding approximately With the segmental length of the threads to interlock the threads olf the link with the threads 0; the stern and is correspondingly turned in the opposite direc tion to release this ,locking` engagement This is accomplished by a rack 5G operated by a stein 57, connected with a plunger F8, located in hydraulic cylinder 59. rllhe rack is supported against lateral movement by `guides 69, 6l and 62 and is shown us provided with wear plates 63.

T he cylinder 59 is fed by valve 64 throunjh intereonnectingpipes and 6G and the valve receives its iiuidV supply through pipe 67 and rexhausts i'ireely to the atmosphere. The cylinder 59, valve 64 and pipe connections all swing with the link closure and therefore must be so connected as to be capable of performing their several 'functions notWitlistanding` movement of the link closure.

The supply pipe 67 receives its fluid pressure from a pipe 68 coaxial With the pivot of the link closure and can therefore easily be maintained in connection with this supply byV any of a numberof joints well known and generally used in the hydraulic art to maintain connection between relatively swinging parts. Pipe 68 is ted through u supply pipe G8 as hereinafter indicated.

I connect the valve stein 69 with a plunger 7 O by any suitable thrust connection such as straps 71. The plunger extends through an opening' 72 in car-:ing 73 nearly to the bottoni of the casing' and beyond the axis 7l of rotation of the link. The openinsr 72 passes clear through the casingY and ai; its upper end is counterbored at 75 to receive a collar 76 upon the plunger. It also receives :i spring 77 Which presses donnnnrdlv upon the collar and seated at its upper end at 78.

In closed position et the link closure. the lower end '.79 oinA the plunger 7 0 and the lower part of the openingl 72 are in liney with a, plunger 80 vvhicli in this position olf the parts can be pushed into the opening to press plunger 70 upwardly against the prossure ot sprinv 77 to operate the valve (l-l.

rlhe upward movement ot' plunger S() is limited by a collar 6l und ther plunger is supported by u spriiu;` S2 pressing; anp-inist, the collar at its upper end und scaled :it ttl. rlhe spring` pressure is intended to substantially counteibalance the, weight ot that, part of the operating mechanism for the plunger 8O which is suspended from the plunger. These parts are the plunger 90. straps Si, bell crank und un adjacent part oi" rod 86. by which connection is inode troni the operating lever S7 to lilt and lower the plunger 80. rllhis mechanism should be over-counterbalanced to `rive pluiurcr tl() a, tendency to lie in raised position.

Because ot the tact that the pluiuer 80 cannot be raised until the end of the opening 72 swings in line 'with itT the lever F57 can not be thrown all of the vvuy unless the link closure is in closed position. l'l'ovvever, the lever S7 engages or abuis a stop 66 upon the lever S8 by which the valve lll rontrols fluid pressure and exhaustin \jlinder Because ot the interlizlliagre between lever 87 controlling the locking operation :nid lever 68 controllin the turningY oit the link lever. lever Sil can not he thrown lo open the link until lever 87 has been thvou'n lo release the locking engagement between the link and the stein QS. For the salue reason the lever 87 can not be thrown lullv to locking` position until the lever SS is rulliv home iu position to close the link upon the stem.

llhe lever 87 cri ries a toe 90 bevond its pi .fot point 91 which toe controls movement of lever QQ interlocking with it to prevent. shiiting of lever 22 and the consequent operation of the main pl ungers except when the locking lever 87 is in locking position as shown.

ln operation, ivitl shown in Figures i the parts in the position 2 and 4 the lever S7 is lofi llll

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ing closure for the platen, hydraulically-operated closing and locking mechanisms for the open end, separate connections for operating them, both valve operated, a lever controlling one of the valves to close the open end, a connection between the lever for closing the end and the valve controlling the locking, permitting movement of the lever when the end is closed and preventing the movement when the end is open.

9. An open end bending press, in combination with a swinging closure for the press, and locking mechanism therefor, an hydraulic cylinder and connections for throwing the closing mechanism, a lever controlling operation of this cylinder', an hydraulic cylinder' and connections for operating the locking mechanism, a valve and valve rod controlling operation of this cylinder and an interconnection between the valve rod and the operating lever for the closing cylinder, operative by reason of the *alve rod lying in line with the interlocking connection when the end is closed.

' 10. In an open end bending press, a swing ing closure for the press, means for operating the closure, a rotary lock for the closure, an hydraulic cylinder and plunger and connections for operating the lock, a valve controlling the hydraulic cylinder, a valve rod extending down from the valve past the pivot for the swinging closure, a casing guiding the rod and open in line with it beyond the center about which the closure swings and operating means about which the closure swings adapted to lit inte the opening in the closure in closed position of the closure and to operate the locking mechanism.

1l. In an open end bending press, a swingpress, means for operating the closure, a rotary lock for the closure, an hydraulic cylinder and plunger and connections for operating the lock, a valve controlling` the hydraulic cylinder, a valve rod extending down from the valve across the pivot foi-"the swinging closure, a easing guiding the rod and open in line with it beyond the center about which the closure swings, operating means movable across the axis about which the closure swings and adapted to fit into the opening in the closure when the latter is in closed position to operate the locking mechanism and eounterbalaneing for the movable parts.

l2. In a bending press having an open end, a link closure for the open end, a pivot for -Ithe closure at the lower end of the link and a breech block type lock holding the link in place.

13. An open `end bending press, in combination with a link closure for the open endl and a lock for the link closure operative iu the closed position and .inoperative in open position of the link closure.

14. In an' open end bending press, upper and lower beams open at one end, hydraulic press-operating means, closing mechanism for the open end and locking devices for the closing mechanism interlocking with the press-operating means.

l5. ln an open end bending press, upper and lower beams open at one end, hydraulic press-operating means, power-operated closing mechanism for the open end and poweroperated locking devices for the closing mechanism.

i6. In an open end bending press, upper and lower beams open at one end, hydraulic press-operating means, power-operated closing mechanisms for the open end and poweroperated locking devices for the closingmechanism interlocking with the closing mechanism.

HENRI PIERRE LAURENT LAUSSUCQ. 

